Improve my headlights?

Headlight technology continues to improve, even as the standards used in the U.S. (and by default, Canada) keep us from getting the flexible output, cutting-edge lighting used elsewhere in the world.

As is the case in many products, some headlights are better than others, even among those using the same bulb as a light source.

So what to do when your headlight performance is subpar? Provided the lenses of the lamps aren’t dull and cloudy from age (we covered repairing that in the Aug. 7 “How Do I”), lacklustre performance may simply be due to aim. It’s not unusual for lamps to be improperly aimed right out of the factory. A small adjustment can make a big difference.

If your headlights are halogen, then the bulbs themselves can be replaced. But resist the urge to hit Amazon and buy the first set of LED drop-in bulbs that look promising. Due to the considerable differences in the optical properties between the two light sources, it is impossible for an LED bulb to perfectly match the output of a halogen bulb. They may appear brighter, and they will be “whiter,” but LEDs will always compromise the beam pattern and dramatically increase glare when used in a halogen lamp housing.

Instead, for a less dramatic, but likely more functional upgrade, consider higher-output halogen bulbs, such as Sylvania SilverStars or Philips’ “Vision” product line.

Although many vehicle models now offer one or more designs based on trim level or option selection, changing them after the fact is often impractical. Another alternative might exist: complete aftermarket upgrade lamps are available for many popular models (trucks and SUVs particularly). Be forewarned, the good quality ones will be expensive. Look for lamps that meet SAE/DOT, or E-code standards.